Dash cam loop recording, why do this?

by BENXIANLI on February 29, 2024


All FOCUWAY dash cams support loop recording functionality. When the memory card is full, newly recorded video files overwrite the oldest ones, deleting the earliest video to make space for the latest. Ever wonder why it's done this way?

Take the FOCUWAY D2 duo dash cam as an example. If recording both front and rear views in 4K+1080P resolution, the included 64GB memory card can store approximately 5 hours of video.

This means that within 5 hours of driving after starting the car, the dash cam's storage space will be exhausted. While you can opt for larger 128GB or 256GB SD cards for extended storage, once the memory card is full, manual deletion or formatting is needed to allow the dash cam to continue recording.

This is where FOCUWAY's loop recording feature comes in handy! To achieve perfect loop recording, the dash cam slices driving footage into segments every 1/3/5 minutes (depending on your loop recording settings, recommended to set at 1 minute). The sliced videos are sorted by recording time, and when the memory card is full, the dash cam deletes the oldest video segment before saving the newest. This way, the memory card continuously stores the latest 5 hours of driving footage.

Why slice videos into 1-minute (recommended) segments?

Firstly, 1-minute segments facilitate clearer file organization, allowing easy location of video segments based on the time of incidents.

Moreover, shorter segments ensure that each loop doesn't replace a long stretch of evidence, which is crucial for evidence preservation.

Lastly, in case of a severe accident causing an instantaneous power loss, longer segments may result in large files that cannot be saved promptly, risking damage to accident videos.

How to ensure important segments (accidents) aren't overwritten?

FOCUWAY dash cams have built-in gravity sensors that continuously operate during driving. Upon detecting a collision, the gravity sensor automatically locks the current video segment. Locked videos are stored in a dedicated area, exempt from loop recording and immune to being overwritten. Additionally, FOCUWAY T5, T5 pro, T6, D2 duo models support manual locking via voice command ("Lock the video") or by pressing the lock button. For D2 duo dash cams, manual locking can be done through a button press.

I've enabled loop recording, why does the dash cam prompt me to format the memory card after a few weeks?

As mentioned earlier, emergency-locked and manually-locked videos don't participate in loop recording. When these videos fill up the SD card's storage space, loop recording becomes impossible. Even if you haven't had an accident, the presence of numerous locked videos is typically due to:

  1. Collisions causing automatic locks.
  2. Parking monitor detecting vehicle vibrations and auto-locking.
  3. Manual locks triggered by voice commands or button presses.
  4. Gravity sensor misfires due to bumpy roads, speed bumps, abrupt braking, acceleration, or other road conditions. This is unavoidable but can be addressed by minimizing the gravity sensor's sensitivity.

Is parking mode time-lapse recording also loop recording?

Yes, time-lapse recording in parking mode also involves loop recording. If a collision is detected while parked, the gravity sensor locks the corresponding time-lapse segment.